IGNEOUS CONCRETE UTILIZING VOLCANIC ASH

Green concrete is the latest development in the field of construction technology which offers a sustainable and eco-friendly solution as a building material. The cement used in conventional concrete is responsible for releasing high amount of carbon dioxide which is harmful for the environment. The concept of green concrete renders replacement of cement partially or fully by various materials which are either byproducts in the production process of other materials or recycled waste. In this paper we focuses on replacing a different percentage of the cement with pozzolanic materials and also replacing the coarse and fine aggregate with locally volcanic materials to produce an eco-friendly and sustainable concrete. Thus, Four trail mixes were casted for estimating the concrete materials and proportion, also fifteen mixes were casted with some variables . Two types of coarse aggregate were used (dolomite and volcanic rock) to show the effect of volcanic aggregate on concrete properties. Fly Ash was used with 10% replacement of the cement , Volcanic ash was used with ( 20 % to 80%) replacement of the cement , the water cementatious ratio equal 0.3, Super plasticizer (visocrete-3425) was used with constant ratio 1% of the cement. Ordinary Portland cement was used in all mixes with constant cement content equal 500 kg/m3. Slump test were prepared on concrete in its fresh phase, hardened concrete tests (compression strength, bond strength, and bending strength) were prepared to identify the mechanical properties of concrete, the results show that using volcanic ash as a replacement of the cement nearly does not affect the slump of concrete, but on the other hand enhances the mechanical properties of concrete.